Changes on Schistosoma mansoni (Digenea: Schistosomatidae) worm load in Nectomys squamipes (Rodentia: Sigmodontinae) concurrently infected with Echinostoma paraensei (Digenea: Echinostomatidae)

Maldonado, Arnaldo; Coura, Renata dos Santos; Garcia, da SIlva; Rm, Lanfredi; L, Rey

doi:10.1590/s0074-02762001000900030

Cited by 13 publications

(9 citation statements)

References 27 publications

(21 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The larvae of Echinostoma paraensei (Lie and Basch, 1967) develop in an aquatic snail until the cercarial phase, at which point the cercariae emerge and penetrate a second intermediate snail host, where they develop until the metacercarian stage, to ensure infection of a final vertebrate host (Maldonado et al, 2001). These initial phases are essential for the trematode to multiply.…”

Section: Introductionmentioning

confidence: 99%

Changes in the reproductive biology of Biomphalara glabrata infected with different doses of Echinostoma paraensei miracidia

Tunholi¹,

Lustrino²,

Tunholi-Alves³

et al. 2011

Journal of Invertebrate Pathology

View full text Add to dashboard Cite

The egg-laying rate, number of egg masses, number of eggs/mass, number of eggs hatched/snail and egg viability of Biomphalaria glabrata exposed to different doses (5 and 50) of Echinostoma paraensei miracidia were analyzed as indicators of reproductive activity. Polystyrene plates were placed in aquariums containing the snails and every other day for four weeks after infection the plates were removed to count the number of egg masses and eggs laid. After this, the plates were numbered individually and placed in new aquariums free of snails and the egg masses were observed daily to determine the hatching rate. On average there was an increase in the parameters evaluated in the infected snails in relation to the controls (uninfected snails), except for egg viability, which was significantly lower in the groups infected with 50 miracidia. These findings indicate that when infected, this host snail is able to increase its reproductive activity, suggesting an ecological strategy to maintain the species.

show abstract

Section: Introductionmentioning

confidence: 99%

Changes in the reproductive biology of Biomphalara glabrata infected with different doses of Echinostoma paraensei miracidia

Tunholi¹,

Lustrino²,

Tunholi-Alves³

et al. 2011

Journal of Invertebrate Pathology

View full text Add to dashboard Cite

show abstract

“…The echinostomatides have been widely studied as biological control agents of schistosomiasis (Maldonado et al 2001b), andKanev et al (2000) stated that the adult and larval stages of echinostomatides were widely used as a model for laboratory studies on the biology, physiology, bio-…”

Section: Introductionmentioning

confidence: 99%

Ultrastructure of the Miracidium of Echinostoma paraensei Lie and Basch, 1967 (Trematoda, Echinostomatidae)

Pinheiro

Maldonado²,

Attias

et al. 2005

Parasitol Res

Self Cite

View full text Add to dashboard Cite

The morphology of Echinostoma paraensei was studied using transmission electron microscopy. The terebratorium region has many electrondense secretory granules and many folds on the surface. The epidermal cells that cover the larval body have unique nuclear morphology, many mitochondria and vesicles being attached to the interepidermal ridges by a septate junction. The cilia present the organization 9 + 2 and a typical structure with a shaft, axosome, basal body and rootlet. Below the epidermal cells there is a layer of circular muscle and, adjacent to it, a layer of longitudinal muscle fibers. The excretory system has two flame cells, with internal and external ribs and leptotriches at the barrel region, an excretory vesicle and an excretory pore.

show abstract

“…In the UK, Behnke et al (2005) also found no interactions between the helminth community of the wood mouse, Apodemus sylvaticus. On the other hand, Maldonado et al (2001a) showed a synergistic interaction between S. mansoni and E. paraensei under laboratory conditions. Infection of N. squamipes by S. mansoni facilitated the establishment of E. paraensei and prolonged the life span in the infected vertebrate host.…”

Section: Discussionmentioning

confidence: 91%

Helminth communities of Nectomys squamipes naturally infected by the exotic trematode Schistosoma mansoni in southeastern Brazil

Maldonado

Gentile

et al. 2006

J. Helminthol.

View full text Add to dashboard Cite

The water rat Nectomys squamipes is endemic in Brazil and found naturally infected with Schistosoma mansoni. Helminth communities, their prevalences, intensity of infection and abundance in N. squamipes in an endemic area of schistosomiasis in the state of Rio de Janeiro, Brazil were studied. Four species of nematodes (Physaloptera bispiculata, Syphacia venteli, Hassalstrongylus epsilon and Litomosoides chagasfilhoi) were recovered in 85.3%, two trematodes (Schistosoma mansoni and Echinostoma paraensei) in 38.8% and one cestode species (Raillietina sp.) in 1.7% of rats examined. Rats were infected with up to five helminth species each, and these were highly aggregated in distribution. For H. epsilon and S. venteli, intensities and abundances were higher in adult male and subadult female hosts, respectively. Hassaltrongylus epsilon, P. bispiculata, S. venteli and S. mansoni were classified as dominant species, L. chagasfilhoi and E. paraensei as co-dominant and Raillietina sp. as subordinated. No significant correlation was found in the intensity of infecton between each pair of helminth species. Schistosoma mansoni was not related to any other helminth species according to their infection rates, althougth S. mansoni was well established in the natural helminth comunity of the water rat.

show abstract

Changes on Schistosoma mansoni (Digenea: Schistosomatidae) worm load in Nectomys squamipes (Rodentia: Sigmodontinae) concurrently infected with Echinostoma paraensei (Digenea: Echinostomatidae)

Cited by 13 publications

References 27 publications

Changes in the reproductive biology of Biomphalara glabrata infected with different doses of Echinostoma paraensei miracidia

Changes in the reproductive biology of Biomphalara glabrata infected with different doses of Echinostoma paraensei miracidia

Ultrastructure of the Miracidium of Echinostoma paraensei Lie and Basch, 1967 (Trematoda, Echinostomatidae)

Helminth communities of Nectomys squamipes naturally infected by the exotic trematode Schistosoma mansoni in southeastern Brazil

Contact Info

Product

Resources

About